Stove-pipe damper



@uitrit tste @anni @fitte DAVID MANUEL,l OF BOSTON, MASSACHUSETTS,ASSIGNOR TO HIMSELF AND WILLARD MANUEL, OF SAME PLACE.

Letters .Patent No. 72,212, dated December 17, 1867.

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TO ALL WHOM IT MAY CONCERN: t

i Be it known that I, DAVID MANUEL, of Boston, in the county of Su'olk,and State oi Massachusetts, have invented a new and useful Improvementin Stove-Pipe Dampers'; and I do hereby declare that the following is afull, clear, and exact description thereof, which will enable othersskilled in the art to make and use the same, reference being-had to theaccompanying drawings, forming part ofthis specification, in which-Figure 1 is a top or bottom view of my improved damper, bothfsides beingalike.

Figure 2 is an edge view oi the damper when the pivot-rod is out.

Figure 3 is a section taken in the line :v x, g. 1. i

Similar letters of reference indicate like parts. A A

This invention relates to an improvement in the construction of dampersfor stove-pipes, and consists in two cast-iron disks which havefiatvcentral surfaces, and are interlocked, so that they lie closetogether when united by the pivot suspension-rod of the damper. Theyhave iiuted or corrugated edges, which overlap the oppositeAcorrugations on the opposite disks, and form concave radiators aboveand below, so related to each other that the smoke and heated gases canenter therein from below and receive a reverse movement, which deeets.them against the stove-pipe, thus imparting more heat to the air in aroom before inally escaping.

Two cast-iron plates or disks, A A, made precisely alike, have alcentralpart, B, made ilat, so that the two disks may lie close together, andcachpurt is countersunk or furrowed across the inner face, for receivingonehalf 'of the pivot-rod a, which is'held in place for locking the twodisks A A together, by two bridgedoops, b b, on each of the disks,projecting through corresponding holes in the centre of each one, asshown in fig. 3. On the edge of each of the disksA A are curved wings, cc, which radiate from the centro, and riseY crowning on the outside ofthe disks, as shown in gs. l and 2. The radiating wings are separated byspaces, 'm 1.11 and are so placed in each disk that when the disks areput together theybreak joints with each other, and the spaces betweenthem open into the concave sides of the` radiators, as shown in g.'2.

The damper is hung inaI stove-pipe by the pivot-rod a, in the usual way,and it will be manifest that when the damper is closedas much as it canbe, by turning it square with the pipe, the products of combustion willpass up through the spaces m '1n between tho radiating wings'c c of thelower disk, and strike the concave inside of the radiating wings c c ofthe upper plate, from which they wilLbeAIefiected against the walls ofthe stove-y pipe, and impart a portion of their heat to it, beforeescaping through the spaces m m between the wings cl e of the upper diskof the damper, thereby retaining the products of'combnstion. as long aspossible, without actu-` ally cutting o` the draught. v

Having thus described my invention, I claim as new, 'and desire tosecure by Letters Patent- A stove-pipe damper formed of two fiateast-iron disks, A A, united solidly in the middle, and interlocked byloops b b, upon the suspension-rod ct, with ,concave radiating edges, cc, arranged and operating as herein described. v DAVID MANUEL.

I Witnesses:

WM.. F. McNAMAnA, ALEX. F. Berners.

